[CI][Windows] github Action to build in windows

[cvvergara]

Fixes #2096
In appveyor its only building not testing due to lack of knowledge of windows

• intall boost
• install msbuild
• Configure: pass
• Build: is failing passing
• Not testing
  • There is no need to install PostGIS to build, only to test is needed but we are not testing

Getting a lot of errors: Errors fixed!

C:\Strawberry\c\include\postgresql\server\c.h(65,10): fatal error C1083: Cannot open include file: 'strings.h': No such file or directory

@pgRouting/admins

[krashish8]

The build is passing @cvvergara

[cvvergara]

@krashish8
Can you remove also everything related to appveyor:
appveyor.yml
ci/appveyor

[dkastl]

Very nice!
I'm looking forward to close the Appveyor account ;-)

[cvvergara]

The account has been closed for some time. I didn't close mine just to keep track of things